CHEMICAL ENGINEERING JOURNAL
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2026
·
IF 13.2
Kai Xu,Shuang Yuan
Urban heat islands and the rising energy consumption of dense cities call for scalable passive cooling solutions. Conventional green roofs offer ecological and thermal benefits but are constrained by the optical and physiological limits of natural leaves. Here, we report a bionic green roof material that replicates key leaf-inspired functions while enabling effective thermal regulation through engineered optical and hygroscopic properties. The material features a TiO 2 –LiCl/PVA composite film on a reflective aluminum substrate, combining high solar reflectance, strong sky-facing emissivity, and low downward thermal emission for efficient radiative cooling. The LiCl-doped PVA film is capable of reversible moisture absorption–desorption, emulating transpiration-driven evaporative cooling without irrigation or stomatal limitation. Outdoor experiments confirm significant reductions in roof and indoor temperatures under both sunny and cloudy conditions, while simulations predict 12.7%–23.1% reductions in annual cooling energy consumption in typical hot urban climates. The bionic green roof also exhibits excellent durability and self-cleaning capability, demonstrating a robust, maintenance-free approach for climate-adaptive and energy-efficient architecture. These results highlight a scalable material-based strategy that addresses key limitations of traditional vegetated roofs by integrating radiative and evaporative cooling, offering a practical route toward low-carbon and climate-adaptive architecture.
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高影响因子
ACS Applied Nano Materials
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2026
·
IF 5.5
Yi Zheng,Shuaishuai Zhu,Keyi Liu,Zengneng Ma,Rong Ma,Jing Zhang,Chunlei Li
Poor adsorption and sulfate-induced high carrier recombination limit the CO2 photocatalytic reduction activity of TiO2 nanoparticles (anatase phase, average diameter ∼15 nm, and specific surface area 37.42 m2/g), as well as the generation of C–H added-value compounds. In this work, the difficulty of generating CH4 by photoreduction of CO2 on TiO2 was solved by constructing a composite of porous nitrogen-doped activated carbon (p-CN-2) with hierarchical nanochannels (5–20 nm), nanopores (<5 nm), and TiO2 nanoparticles. The introduction of p-CN-2 promoted the adsorption of CO2 and proton generation. Meanwhile, pyridine N in p-CN-2 interacts with TiO2 to establish a Ti–N–C photocarrier separation channel to enhance the effective photogenerated charge density. Promoted CO2, protons, and photocarrier concentrations modulate the occurrence of photocatalytic CO2 methanation on TiO2. The CH4 4 h yield of TiO2/p-CN-2 is 47.12 μmol·g–1, which is about 50 times higher than that of TiO2. The CH4 selectivity of TiO2/p-CN-2 increases from 15.53% TiO2 to 82.05%. This work presents a facile and effective method for facilitating photocatalytic CO2 methanation using TiO2 as a model. This work presents a facile and effective method for facilitating photocatalytic CO2 methanation using TiO2 nanoparticles as a model, and the prepared TiO2/p-CN-2 nanocomposite is particularly well-suited for solar-driven CO2 methanation in carbon recycling systems and renewable energy production (e.g., coupling with photovoltaic devices for green CH4 fuel synthesis).
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2026
·
IF 8.5
Li Guo,Rongfeng Wu,Yajun Wei,Zhen Yao,Xiaopin Su,Qiong Su,Jing Yu
Water pollution caused by anionic dyes, particularly exemplified by Congo Red (CR), poses a serious threat to ecosystems. To address this, a TiO 2 -chitosan-cyclodextrin polymer (CS-β-CDP/TiO 2 ) was prepared via a host-guest recognition strategy. Its unique structure not only prevented the aggregation of TiO 2 but also endowed it with an adsorption-photocatalytic synergistic effect, enabling the effective removal of CR. Detailed characterization (FTIR, XRD, XPS, TEM, TGA) confirmed the successful integration of anatase TiO 2 nanoparticles (ca. 6–15 nm) onto the chitosan-cyclodextrin polymer (CS-β-CDP), with a TiO 2 loading of 53%. The introduction of TiO 2 led to a substantial increase in the BET surface area, which reached 15.597 m 2 ·g −1 . The corresponding adsorption capacity of CS-β-CDP/TiO 2 was 124.2 mg·g −1 under optimized conditions. The adsorption process was well described by the Langmuir isotherm model and obeyed the pseudo-second-order kinetic expression. Furthermore, electrochemical impedance spectroscopy (EIS) and photoluminescence (PL) analyses confirmed the photocatalytic activity of CS-β-CDP/TiO 2 . Remarkably, the photocatalytic degradation rate was 99.5% under UV irradiation, the TOC (total organic carbon) analysis confirmed the effective mineralization of the dye. Importantly, possible pathways for CR degradation were proposed based on the results of LC-MS analysis and trapping experiments. Furthermore, the composite material demonstrated excellent stability with low Ti ion leaching (5.089 mg/L) and retained high performance over five adsorption-photocatalytic regeneration cycles. This demonstrates a new approach for the combined application of chitosan and TiO 2 , highlighting the potential of CS-β-CDP/TiO 2 as a green, recyclable solution for wastewater remediation.
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PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2026
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IF 9.1
Shidi Li,Xiao Zhang,Zhiren Guo,Tengfei Gao,Dagang Li,Jinlei Song,Yihui Yuan,Xiyan Xu
Efficient U(VI) capture and its catalytic reduction to U(IV) is of importance for both environmental protection and uranium resource recovery, whereas the available adsorbents and catalysts are still inefficient or expensive. The current study synthesizes an efficient and cost-effective polyacrylic acid (PAA) cryogel with B-doped TiO 2 nanoparticle photo-active cores (B-TiO 2 @PAA) for adsorptive- photocatalytic capture and reduction of U(VI). The testing results show that the current B-TiO 2 @PAA exhibits a 1.95-fold enhancement compared to that of the pristine PAA gel under simulated sunlight radiation with high stability and selectivity. A synergistic effect between the PAA substrate and the B-TiO 2 active cores for uranium capture is also revealed. B-TiO 2 serves as crosslinkers of the cryogel to improve the porous structure and stability. It reduces the proportion of the medium size pores (3–30 μm) for a lower mass transfer resistance, whereas those of both larger (> 30 μm) and smaller (< 3 μm) size pores are increased. The former provides a better mass transfer condition, and the latter a confinement effect for a fast uranium capture on the activated sites. Meanwhile, B-TiO 2 is also tested as a conductivity regulator of the cryogel to enable semiconducting behavior for an intensified photocatalytic performance. This study provides a novel “Nano-photocatalyst@Cryogel” strategy for the design of U(VI) capture materials from aquatic media.
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Journal of Physics-Energy
·
2020
·Vol. 3
·期 1
·014003
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IF 0
Guanda Zhou,Ting Zhao,Oumin Wang,Xin Xia,Jia Hong Pan
Rutile TiO2 nanorod arrays vertically aligned on conductive fluorine-doped tin oxide glass are optimized for photocatalysis in terms of the density and diameter of nanorods by tuning the concentration of Ti precursor and reaction time during the hydrothermal process. Quantum dots (QDs) of V2VI3( V = Bi; VI = Se, Te) topographic insulators are then employed as sensitizers to enhance the visible-light response of TiO2. Electrochemical measurements show that the decoration of Bi2Se3 or Bi2Te3 significantly increases the photocurrent due to the enhanced light harvesting properties and the charge carrier separation capability mediated by the topographic isolation effect of V2VI3 QDs. Photoelectrocatalytic (PEC) activity evaluation is conducted towards the decoloration of azo dyes, including methyl orange and methylene blue under the sunlight irradiation. The elaborated Bi2Se3/TiO2 nanorod array exhibits the superior PEC performances, presenting shows great potentials in environmental remediation.
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Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 5
·123798
·
IF 7.5
Hao Zhang,Tao Wang,Xinyi Liao,Xiqing Liu,Qiuyue Men,Mingmin Bai,Yongqing Wang
The construction of heterojunction photocatalysts featuring broad spectral response and efficient charge separation was crucial for the decomposition of organic pollutants. In this work, CuInS 2 quantum dot (CIS QDs)-modified TiO 2 nanorods (CISQ/TiO 2 ) composite photocatalysts with varying compositions were fabricated via a facile solvothermal process. Their visible-light-driven photocatalytic activity was subsequently evaluated using the degradation of 2,4-dichlorophenol (2,4-DCP) as a model reaction. The results indicated that when the CIS QDs loading was 10 wt%, the photocatalytic activity was significantly enhanced. A series of characterizations revealed that the improved activity arose from the synergistic effects of the narrow-band-gap CIS QDs, which broadened the light absorption spectrum of TiO 2 and thereby increased light utilization. Furthermore, the proposed Z-scheme-like charge transfer accelerated the migration of photogenerated charge carriers while preserving the high redox potential of the system. This work demonstrated a facile strategy for constructing high-performance TiO 2 -based composite photocatalysts, with significant implications for environmental remediation.
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JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
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2026
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IF 2.6
Xu Xiaobin,Gao Qiang,Ma Yue,Dong Chengwei,Ye Bing,Zhou Fei
M142 aluminum alloy, commonly used in piston systems, exhibits inadequate performance under prolonged high-temperature and high-load conditions. This study developed a TiO 2 nanoparticle-reinforced Ni-Fe composite coating via electrodeposition to address this. The effect of FeSO 4 ·7H 2 O concentration on Ni-Fe coatings was first investigated. The results show that hardness increased with FeSO 4 ·7H 2 O concentration, while the wear rate initially decreased and then increased. Adding TiO 2 nanoparticles effectively mitigated the adverse effects of high Fe content, leading to a dense, homogeneous composite structure (NFT15). Compared to the NF25 coating, the TiO 2 -reinforced coating demonstrated a 19.5% increase in hardness, a 30% improvement in adhesion strength, and a 30.9% decrease in wear rate. It also exhibited superior thermal stability, maintaining structural integrity and showing a 41.7% hardness increase after thermal cycling. Finally, a multi-performance evaluation identified the composite coating with 15 g L −1 TiO 2 as possessing the optimal overall properties.
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高影响因子
ChemistrySelect
·
2026
·Vol. 11
·期 18
·e73395
·
IF 2.3
Jiran Liang,Yixuan Zhang,Yingfu Zhang,Xiaoping Gao,Haigang Liu,Qian He
Although TiO 2 aerogel has structural advantages, they often suffer from low sensitivity in NH 3 detection. To improve the response of ammonia (NH 3 ) sensing at room temperature (25°C), this study aims to increase the concentration of surface hydroxyl groups. The sol-gel method and ambient pressure drying are used to prepare TiO 2 aerogel, and the influence of the molar ratio of water in the precursor solution is studied. The results show that when the water molar ratio was 19.7%, the TiO 2 aerogel sensor exhibits a significant response 14.12 to 50 ppm NH 3 . The enhanced sensing response is attributed to the adsorption of NH 3 onto the abundant surface hydroxyl groups via hydrogen bonding. And the aerogel framework provides active sites (e.g., –OH and oxygen vacancies) that favor NH 3 adsorption. This work provides a method to fabricate room-temperature NH 3 sensors with improved performance using TiO 2 aerogels. Compared with previously reported TiO 2 aerogel NH 3 sensors, this work achieves a shortened response time. Despite long recovery time and humidity-induced response suppression, the TiO 2 aerogel structure provides a foundation for future room-temperature NH 3 sensors. Graphical TiO 2 aerogels were synthesized via a sol-gel method followed by ambient pressure drying. The obtained material exhibits short response time and good selectivity toward ammonia (NH 3 ). The structural properties were characterized by XRD, FT-IR, FE-SEM, XPS, and BET. The TiO 2 aerogel shows a response of 14.12 toward 50 ppm NH3, with response/recovery time of 4/140 s.
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高影响因子
ACS Catalysis
·
2026
·
IF 13.6
Jinzeng Guo,Penghao Li,Diandian lv,Wenxiang Zhu,Qi Shao,Zhenhui Kang,Mingwang Shao,Fan Liao
Developing durable and active catalysts for the acidic oxygen evolution reaction (OER) remains a central challenge for water electrolysis. Here, we demonstrate that constructing supported p−n junctions provides an effective strategy to simultaneously couple interfacial water activation with active-site stabilization. RuO2 nanoparticles immobilized on oxygen vacancy-rich TiO2 nanoribbons (RuO2/TiO2NRs) form a robust p−n heterojunction whose built-in field directs charge separation and tunes interfacial energetics. TiO2 acts as a water-activation co-catalyst, facilitating H2O dissociation at the junction, while structural confinement and charge redistribution suppress Ru over-oxidation and dissolution. A transient potential scanning technique directly visualizes the interfacial charge storage and release behaviors, providing dynamic evidence for the built-in electric field of the p−n junction in regulating charge separation and water-dissociation kinetics. Theoretical calculations reveal electron enrichment on Ru, weakened *OH/*O adsorption, and a reduced barrier for the potential-determining *O → *OOH step, while differential electrochemical mass spectrometry confirms an adsorbate-evolution mechanism without lattice oxygen participation. Consequently, RuO2/TiO2NRs deliver an overpotential of 192 mV at 10 mA cm−2 in 0.5 M H2SO4 and sustain a ∼650 h durability. This heterojunction-guided loading strategy unifies activity and acid durability by co-engineering charge transfer and water activation at oxide/oxide interfaces.
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高影响因子
MOLECULES
·
2026
·Vol. 31
·期 16
·2773
·
IF 5.1
Jun Tong,Yulin Shen,Minhua Huang,Huiwen Pang,Qian Yan,Lihong Yao
Bamboo is a renewable and mechanically robust bio-based material with potential for sand-barrier construction; however, its long-term outdoor use is limited by ultraviolet-induced photoaging, moisture uptake, wind-sand abrasion, and biological colonization. In this study, a fluorine-free EP/TiO2/ODTMS superhydrophobic coating was deposited on moso bamboo using a simple spraying process. Rutile TiO2was incorporated as a roughness-building and ultraviolet-shielding filler, waterborne epoxy resin served as a film-forming binder to improve particle anchoring and coating cohesion, and octadecyltrimethoxysilane was used to reduce the surface energy. The formulation containing 50–100 nm rutile TiO2and 2 wt.% epoxy resin provided the best overall balance between surface wettability and mechanical durability, with a water contact angle of 156.4° and a sliding angle of 6.9°. SEM observations revealed a hierarchical surface composed of TiO2particles and microscale agglomerates immobilized within the epoxy matrix. EDS and FTIR results supported the incorporation of TiO2- and ODTMS-derived components, while UV–Vis–NIR diffuse-reflectance measurements showed an improved optical response in the ultraviolet region. The coating retained superhydrophobicity after sandpaper abrasion, gravel impact, and tape-peeling tests. After 672 h of xenon-lamp aging, the coated bamboo maintained a water contact angle above 150°, exhibited a total color difference of approximately 7.65, and retained 91.1% of its initial flexural strength. In addition, qualitatively reduced visible mildew colonization was observed during 45 days of high-humidity exposure. These results demonstrate that the spray-deposited coating provides a fluorine-free and potentially scalable approach for improving the water repellency, mechanical durability, and accelerated-weathering resistance of bamboo sand-barrier materials.
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PubMed
高影响因子
CHEMICAL ENGINEERING COMMUNICATIONS
·
2025
·
IF 2
Fan Pan,Lijiang Tian,Fulong Chen,Jie Zhang
The photocatalytic efficiency of titanium dioxide(TiO2) is easy to restrict by rapid recombination of carriers, narrow spectrum response range, and low specific surface area. Constructing heterojunctions has been widely acknowledged as a viable strategy to enhance the photocatalytic performance of TiO2. Here, TiO2@MIL-101(Cr) heterojunction was synthesized via the in-situ method and applied to adsorbing and photocatalytic degrading of gaseous benzene. The findings demonstrate 40TM exhibited the best adsorption(1157.03 μgC6H6/(g·h)) and photocatalytic(817.80 μgC6H6/(g·h)) performance, which were 2.05 and 5.21 times of TiO2, respectively. The enhancement of adsorption performance probably resulted from the higher specific surface area(637.33 m2/g) and the micro-mesoporous structure. The excellent photocatalytic performance might stem from the extended wavelength response range(400–700 nm) and the Z-scheme heterojunction formation. The possible mechanism is that electrons in MIL-101(Cr) and holes in TiO2 could participate in redox reactions to generate radicals, with superoxide radicals(∙O2−) and hydroxyl radicals(∙OH) being identified as the primary active species for benzene degradation. Overall, this investigation offers a valuable reference for the application of heterojunction catalysts in the field of adsorption-photocatalytic degradation of volatile organic compounds (VOCs).
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PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2025
·
IF 7.8
Bohan Zhang,Chang Wen,Mingtao Xu,Zhaoxi Ye,Wenshang Chen,Ben Chen,Qingsong Hua,Ke Liu,Zhengkai Tu
Proton exchange membrane water electrolysis (PEMWE) is a promising technology for sustainable hydrogen production, nevertheless it faces challenges related to the high cost and scarcity of noble metal-based anodic catalysts. Herein, we report a low-cost, high-performance acidic oxygen evolution electrocatalyst, Cr 0.66 Ru 0.34 O 2 /TiO 2 , consisting of chromium-ruthenium mixed oxides supported on a TiO 2 substrate. The catalyst was synthesized through sol-gel and hydrothermal methods, enabling controlled crystallinity and uniform dispersion. By tuning the Cr/Ru ratio, we elucidated the synergistic interaction between Cr and Ru, which modulates the electronic structure and morphological characteristics of the catalyst, thereby promoting the lattice oxygen mechanism (LOM) and enhancing catalytic activity. TiO 2 was employed as a support due to its high specific surface area and excellent chemical stability under acidic conditions, which helps stabilize oxygen vacancies and facilitates the oxygen vacancy site mechanism (OVSM), ultimately improving the catalytic stability. The optimized Cr 0.66 Ru 0.34 O 2 /TiO 2 catalyst delivers a low overpotential of 179 mV at 10 mA cm −2 in 0.5 M H 2 SO 4 and demonstrates excellent stability under constant current operation. When applied in a PEM single-cell electrolyzer, the catalyst achieves a low cell voltage of 1.633 V at 1 A cm −2 and stable operation over 180 h at 60 °C, outperforming commercial IrO 2 . These results highlight the potential of Cr-doped Ru-based oxides supported on TiO 2 as efficient and durable anode catalysts for next-generation PEM water electrolyzers with reduced noble metal usage.
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